EASA AIR OPS
Regulation (EU) No 379/2014
ORO.MLR.115 Record-keeping

(a) The following records shall be stored for at least 5 years.

(1) for CAT operators, records of the activities referred to in ORO.GEN.200;
(2) for declared operators, a copy of the operator’s declaration, details of approvals held and operations manual;
(3) for SPO authorisation holders, in addition to (a)(2), records related to the risk assessment conducted in accordance with SPO.OP.230 and related standard operating procedures.

(b) The following information used for the preparation and execution of a flight, and associated reports, shall be stored for three months:

(1) the operational flight plan, if applicable;
(2) route-specific notice(s) to airmen (NOTAM) and aeronautical information services (AIS) briefing documentation, if edited by the operator;
(3) mass and balance documentation;
(4) notification of special loads, including written information to the commander/pilot-incommand about dangerous goods, if applicable;
(5) the journey log, or equivalent; and
(6) flight report(s) for recording details of any occurrence, or any event that the commander/pilot-in-command deems necessary to report or record;